Step 1

Whisk together all of the ingredients for the glaze in a small saucepan. (Be sure to do this off the heat, as cornstarch won't dissolve in hot liquid.) Bring to a boil over high heat, then reduce to low and simmer until thickened, about 1 minute. Cover to keep warm and set aside.

Step 2

Heat the oil in a large nonstick skillet over medium-high heat. Season the salmon fillets with kosher salt. When the oil starts to shimmer, place the salmon, skin-side up, in the pan. Cook until golden brown on the first side, about 4 minutes. Turn the fish over with a spatula, then reduce the heat to medium and cook until the fillets feel firm to the touch, 3-4 minutes more. (If all of the fillets won't fit in the pan, cook the fish in two batches.)

Step 3

Transfer the salmon fillets to plates or a platter and spoon the glaze generously over top. Serve immediately.